{"id":"CVE-2026-92514","state":"PUBLISHED","title":"RDMA/erdma: Fix CEQ tasklet use-after-free on removal","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/erdma: Fix CEQ tasklet use-after-free on removal\n\nEach CEQ interrupt handler only schedules eqc->tasklet. The tasklet calls\nerdma_ceq_completion_handler(), which reads the DMA-coherent EQ ring\nthrough get_next_valid_eqe() and updates eq->dbrec through notify_eq().\n\nerdma_ceqs_uninit() frees each CEQ IRQ and then destroys its EQ.\nfree_irq() prevents another hard IRQ and waits for an in-flight handler,\nbut it does not drain a tasklet that the handler already scheduled. The\ntasklet can therefore access eq->qbuf or eq->dbrec after\nerdma_eq_destroy() frees them.\n\nClearing ceq_cb->ready does not synchronize with a tasklet that already\npassed the check at the start of erdma_ceq_completion_handler().\n\nKill the tasklet after free_irq(), when no handler can schedule it again,\nand before erdma_ceq_uninit_one() releases the EQ buffers.","publishedAt":"2026-09-17T16:10:23.462Z","updatedAt":"2026-10-19T09:04:20.857Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"f2a0a630b953451a59a2612ad8c29246638f0a38","status":"affected","lessThan":"0e8b78dabb1f156db05ffe74c6eae861167c7c21","versionType":"git"},{"version":"f2a0a630b953451a59a2612ad8c29246638f0a38","status":"affected","lessThan":"6e129c1310abfa786a510cc63e69c5ef12349048","versionType":"git"},{"version":"f2a0a630b953451a59a2612ad8c29246638f0a38","status":"affected","lessThan":"f738c0a372d36a10dfae6dc357717c13b2aa72f4","versionType":"git"},{"version":"f2a0a630b953451a59a2612ad8c29246638f0a38","status":"affected","lessThan":"a60c36d8d17f1b86705523d5eb6d290df28831e5","versionType":"git"},{"version":"f2a0a630b953451a59a2612ad8c29246638f0a38","status":"affected","lessThan":"61a25b8d333e1eb2a189881d516f8d5194e26840","versionType":"git"},{"version":"f2a0a630b953451a59a2612ad8c29246638f0a38","status":"affected","lessThan":"0ca79979384f031d710c4b3bae065dcb5d95aca3","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/infiniband/hw/erdma/erdma_eq.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.0","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.0","versionType":"semver"},{"version":"6.1.188","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.157","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.110","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.52","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.6","status":"unaffected","lessThanOrEqual":"7.2.*","versionType":"semver"},{"version":"7.3","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/infiniband/hw/erdma/erdma_eq.c"]}],"references":["https://git.kernel.org/stable/c/0e8b78dabb1f156db05ffe74c6eae861167c7c21","https://git.kernel.org/stable/c/6e129c1310abfa786a510cc63e69c5ef12349048","https://git.kernel.org/stable/c/f738c0a372d36a10dfae6dc357717c13b2aa72f4","https://git.kernel.org/stable/c/a60c36d8d17f1b86705523d5eb6d290df28831e5","https://git.kernel.org/stable/c/61a25b8d333e1eb2a189881d516f8d5194e26840","https://git.kernel.org/stable/c/0ca79979384f031d710c4b3bae065dcb5d95aca3"],"weaknesses":[],"ingestedAt":"2026-10-29T20:13:34.582Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/92xxx/CVE-2026-92514.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-92514","state":"PUBLISHED","datePublished":"2026-09-17T16:10:23.462Z","dateUpdated":"2026-10-19T09:04:20.857Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-09-16T12:21:13.873Z"},"containers":{"cna":{"title":"RDMA/erdma: Fix CEQ tasklet use-after-free on removal","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/erdma: Fix CEQ tasklet use-after-free on removal\n\nEach CEQ interrupt handler only schedules eqc->tasklet. The tasklet calls\nerdma_ceq_completion_handler(), which reads the DMA-coherent EQ ring\nthrough get_next_valid_eqe() and updates eq->dbrec through notify_eq().\n\nerdma_ceqs_uninit() frees each CEQ IRQ and then destroys its EQ.\nfree_irq() prevents another hard IRQ and waits for an in-flight handler,\nbut it does not drain a tasklet that the handler already scheduled. The\ntasklet can therefore access eq->qbuf or eq->dbrec after\nerdma_eq_destroy() frees them.\n\nClearing ceq_cb->ready does not synchronize with a tasklet that already\npassed the check at the start of erdma_ceq_completion_handler().\n\nKill the tasklet after free_irq(), when no handler can schedule it again,\nand before erdma_ceq_uninit_one() releases the EQ buffers."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"f2a0a630b953451a59a2612ad8c29246638f0a38","status":"affected","lessThan":"0e8b78dabb1f156db05ffe74c6eae861167c7c21","versionType":"git"},{"version":"f2a0a630b953451a59a2612ad8c29246638f0a38","status":"affected","lessThan":"6e129c1310abfa786a510cc63e69c5ef12349048","versionType":"git"},{"version":"f2a0a630b953451a59a2612ad8c29246638f0a38","status":"affected","lessThan":"f738c0a372d36a10dfae6dc357717c13b2aa72f4","versionType":"git"},{"version":"f2a0a630b953451a59a2612ad8c29246638f0a38","status":"affected","lessThan":"a60c36d8d17f1b86705523d5eb6d290df28831e5","versionType":"git"},{"version":"f2a0a630b953451a59a2612ad8c29246638f0a38","status":"affected","lessThan":"61a25b8d333e1eb2a189881d516f8d5194e26840","versionType":"git"},{"version":"f2a0a630b953451a59a2612ad8c29246638f0a38","status":"affected","lessThan":"0ca79979384f031d710c4b3bae065dcb5d95aca3","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/infiniband/hw/erdma/erdma_eq.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.0","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.0","versionType":"semver"},{"version":"6.1.188","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.157","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.110","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.52","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.6","status":"unaffected","lessThanOrEqual":"7.2.*","versionType":"semver"},{"version":"7.3","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/infiniband/hw/erdma/erdma_eq.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/0e8b78dabb1f156db05ffe74c6eae861167c7c21"},{"url":"https://git.kernel.org/stable/c/6e129c1310abfa786a510cc63e69c5ef12349048"},{"url":"https://git.kernel.org/stable/c/f738c0a372d36a10dfae6dc357717c13b2aa72f4"},{"url":"https://git.kernel.org/stable/c/a60c36d8d17f1b86705523d5eb6d290df28831e5"},{"url":"https://git.kernel.org/stable/c/61a25b8d333e1eb2a189881d516f8d5194e26840"},{"url":"https://git.kernel.org/stable/c/0ca79979384f031d710c4b3bae065dcb5d95aca3"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-10-19T09:04:20.857Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.0","versionEndExcluding":"6.1.188"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.0","versionEndExcluding":"6.6.157"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.0","versionEndExcluding":"6.12.110"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.0","versionEndExcluding":"6.18.52"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.0","versionEndExcluding":"7.2.6"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.0","versionEndExcluding":"7.3"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}